<template>
  <div>
    <!-- <el-switch v-model="draggable" active-text="开启拖拽" inactive-text="关闭拖拽"></el-switch> -->
    <el-button v-if="draggable" @click="batchSave">批量保存</el-button>
    <el-button type="danger" @click="batchDelete">批量删除</el-button>
    <el-button type="primary" @click="() => append1()">新增一级分类</el-button>
    <el-tree
      :data="menus"
      :props="defaultProps"
      :expand-on-click-node="false"
      show-checkbox
      node-key="catId"
      :indent="60"
      :default-expanded-keys="expandedKey"
      :draggable="draggable"
      :allow-drop="allowDrop"
      @node-drop="handleDrop"
      ref="menuTree"
    >
      <span class="custom-tree-node" slot-scope="{ node, data }">
        <span>{{ node.label }}</span>
        <span>
          <el-button
            v-if="node.level <= 2"
            type="text"
            size="mini"
            @click="() => append(data)"
            >添加子分类</el-button
          >
          <el-button type="text" size="mini" @click="edit(data)"
            >修改</el-button
          >
          <el-button
            v-if="node.childNodes.length == 0"
            type="text"
            size="mini"
            @click="() => remove(node, data)"
            >删除分类</el-button
          >
        </span>
      </span>
    </el-tree>

    <el-dialog
      :title="title"
      :visible.sync="dialogVisible"
      width="30%"
      :close-on-click-modal="false"
      @close="closeDialog"
    >
      <el-form :model="category" :rules="categoryRules" ref="addForm">
        <el-form-item label="上级目录" prop="parentName" v-if="category1">
          <el-input v-model="category.parentName" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="名称" prop="name">
          <el-input
            v-model="category.name"
            autocomplete="off"
            @keydown.native="keydown($event)"
          ></el-input>
        </el-form-item>
        <el-form-item label="编号" prop="serialNo">
          <el-input v-model="category.serialNo" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="序号" prop="sort">
          <el-input v-model="category.sort" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="备注" prop="remark">
          <el-input v-model="category.remark" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="submitData">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
//这里可以导入其他文件（比如：组件，工具js，第三方插件js，json文件，图片文件等等）
//例如：import 《组件名称》 from '《组件路径》';

export default {
  //import引入的组件需要注入到对象中才能使用
  components: {},
  props: {},
  data() {
    return {
      category1: true,
      categoryRules: {
        name: [{ required: true, message: "分类名称请填写", trigger: "blur" }],
        productUnit: [
          { required: true, message: "计量单位请填写", trigger: "blur" },
        ],
      },
      pCid: [],
      draggable: false,
      updateNodes: [],
      maxLevel: 0,
      title: "",
      dialogType: "", //edit,add
      category: {
        parentName: "",
        parentId: "",
        name: "",
        serialNo: "",
        sort: "",
        remark: "",
      },
      dialogVisible: false,
      menus: [],
      expandedKey: [],
      defaultProps: {
        children: "children",
        label: "text",
      },
    };
  },
  //计算属性 类似于data概念
  computed: {},
  //监控data中的数据变化
  watch: {},
  //方法集合
  methods: {
    keydown(event) {
      if (event.keyCode == 32) {
        event.returnValue = false;
      }
    },
    getMenus() {
      let id = "";
      this.$http({
        url: this.$http.adornUrl(
          "/materialCategory/getMaterialCategoryTree?id="
        ),
        method: "post",
      }).then(({ data }) => {
        // console.log("成功获取到菜单数据...", data.data);
        this.menus = data.data;
      });
    },
    batchDelete() {
      let catIds = [];
      let checkedNodes = this.$refs.menuTree.getCheckedNodes();
      console.log("被选中的元素", checkedNodes);
      for (let i = 0; i < checkedNodes.length; i++) {
        catIds.push(checkedNodes[i].id);
      }
      console.log(catIds);
      var ids = catIds.toString();
      this.$confirm(`是否批量删除【${catIds}】菜单?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          console.log(ids);
          this.$http({
            url: this.$http.adornUrl(
              `/materialCategory/batchDeleteMaterialCategory?ids=${ids}`
            ),
            method: "post",
          }).then(({ data }) => {
            if (data.code == 200) {
              this.$message({
                message: "菜单删除成功",
                type: "success",
              });
              //刷新出新的菜单
              this.getMenus();
            } else if (data.code === 601) {
              this.$confirm(data.msg, "提示", {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning",
              })
                .then(() => {
                  console.log(1111);
                  this.$http({
                    url: this.$http.adornUrl(
                      `/materialCategory/batchDeleteMaterialCategory?ids=${ids}`
                    ),
                    method: "post",
                    params: this.$http.adornParams({
                      deleteType: 2,
                    }),
                  }).then(({ data }) => {
                    if (data.code == 200) {
                      this.$message({
                        type: "success",
                        message: "删除成功!",
                      });
                      this.getMenus();
                    }
                  });
                })
                .catch(() => {
                  this.$message({
                    type: "info",
                    message: "已取消删除",
                  });
                });
            } else {
              this.$message.error(data.msg);
            }
          });
        })
        .catch(() => {});
    },
    batchSave() {
      this.$http({
        url: this.$http.adornUrl("/product/category/update/sort"),
        method: "post",
        data: this.$http.adornData(this.updateNodes, false),
      }).then(({ data }) => {
        this.$message({
          message: "菜单顺序等修改成功",
          type: "success",
        });
        //刷新出新的菜单
        this.getMenus();
        //设置需要默认展开的菜单
        this.expandedKey = this.pCid;
        this.updateNodes = [];
        this.maxLevel = 0;
        // this.pCid = 0;
      });
    },
    handleDrop(draggingNode, dropNode, dropType, ev) {
      console.log("handleDrop: ", draggingNode, dropNode, dropType);
      //1、当前节点最新的父节点id
      let pCid = 0;
      let siblings = null;
      if (dropType == "before" || dropType == "after") {
        pCid =
          dropNode.parent.data.catId == undefined
            ? 0
            : dropNode.parent.data.catId;
        siblings = dropNode.parent.childNodes;
      } else {
        pCid = dropNode.data.catId;
        siblings = dropNode.childNodes;
      }
      this.pCid.push(pCid);

      //2、当前拖拽节点的最新顺序，
      for (let i = 0; i < siblings.length; i++) {
        if (siblings[i].data.catId == draggingNode.data.catId) {
          //如果遍历的是当前正在拖拽的节点
          let catLevel = draggingNode.level;
          if (siblings[i].level != draggingNode.level) {
            //当前节点的层级发生变化
            catLevel = siblings[i].level;
            //修改他子节点的层级
            this.updateChildNodeLevel(siblings[i]);
          }
          this.updateNodes.push({
            catId: siblings[i].data.catId,
            sort: i,
            parentCid: pCid,
            catLevel: catLevel,
          });
        } else {
          this.updateNodes.push({ catId: siblings[i].data.catId, sort: i });
        }
      }

      //3、当前拖拽节点的最新层级
      console.log("updateNodes", this.updateNodes);
    },
    updateChildNodeLevel(node) {
      if (node.childNodes.length > 0) {
        for (let i = 0; i < node.childNodes.length; i++) {
          var cNode = node.childNodes[i].data;
          this.updateNodes.push({
            catId: cNode.catId,
            catLevel: node.childNodes[i].level,
          });
          this.updateChildNodeLevel(node.childNodes[i]);
        }
      }
    },
    allowDrop(draggingNode, dropNode, type) {
      //1、被拖动的当前节点以及所在的父节点总层数不能大于3

      //1）、被拖动的当前节点总层数
      console.log("allowDrop:", draggingNode, dropNode, type);
      //
      this.countNodeLevel(draggingNode);
      //当前正在拖动的节点+父节点所在的深度不大于3即可
      let deep = Math.abs(this.maxLevel - draggingNode.level) + 1;
      console.log("深度：", deep);

      //   this.maxLevel
      if (type == "inner") {
        // console.log(
        //   `this.maxLevel：${this.maxLevel}；draggingNode.data.catLevel：${draggingNode.data.catLevel}；dropNode.level：${dropNode.level}`
        // );
        return deep + dropNode.level <= 3;
      } else {
        return deep + dropNode.parent.level <= 3;
      }
    },
    countNodeLevel(node) {
      //找到所有子节点，求出最大深度
      if (node.childNodes != null && node.childNodes.length > 0) {
        for (let i = 0; i < node.childNodes.length; i++) {
          if (node.childNodes[i].level > this.maxLevel) {
            this.maxLevel = node.childNodes[i].level;
          }
          this.countNodeLevel(node.childNodes[i]);
        }
      }
    },
    edit(data) {
      console.log("要修改的数据", data);
      this.dialogType = "edit";
      this.title = "修改分类";
      this.dialogVisible = true;
      this.category.parentName = data.text;
      this.category.parentId = data.id;

      // //发送请求获取当前节点最新的数据
      this.$http({
        url: this.$http.adornUrl(
          `/materialCategory/findById?id=${this.category.parentId}`
        ),
        method: "post",
      }).then(({ data }) => {
        //请求成功
        console.log("要回显的数据", data.data);
        this.category = data.data;
        // this.category.catId = data.data.catId;
        // this.category.icon = data.data.icon;
        // this.category.productUnit = data.data.productUnit;
        // this.category.parentCid = data.data.parentCid;
        // this.category.catLevel = data.data.catLevel;
        // this.category.sort = data.data.sort;
        // this.category.showStatus = data.data.showStatus;
      });
    },
    // 添加分类
    append(data) {
      this.$nextTick(() => {
        this.$refs["addForm"].resetFields();
      });
      console.log("append", data);
      this.dialogType = "add";
      this.title = "添加分类";
      this.dialogVisible = true;
      this.category.parentName = data.text;
      this.category.parentId = data.id;
    },
    // 添加一级分类
    append1(data) {
      this.$nextTick(() => {
        this.$refs["addForm"].resetFields();
      });
      this.category1 = false;
      this.dialogType = "add";
      this.title = "添加一级分类";
      this.dialogVisible = true;
      this.category.parentCid = 0;
      this.category.catLevel = 1;
      this.category.catId = null;
      this.category.name = "";
      this.category.icon = "";
      this.category.productUnit = "";
      this.category.sort = 0;
      this.category.showStatus = 1;
    },

    submitData() {
      if (this.dialogType == "add") {
        this.addCategory();
      }
      if (this.dialogType == "edit") {
        this.editCategory();
      }
    },
    //修改三级分类数据
    editCategory() {
      var { catId, name, icon, productUnit } = this.category;
      this.$http({
        url: this.$http.adornUrl("/materialCategory/editMaterialCategory"),
        method: "post",
        data: this.$http.adornData(this.category, false),
      }).then(({ data }) => {
        console.log(data);
        if (data.code === 200) {
          this.$message({
            message: "菜单修改成功",
            type: "success",
          });
          //关闭对话框
          this.dialogVisible = false;
          //刷新出新的菜单
          this.getMenus();
          //设置需要默认展开的菜单
          this.expandedKey = [this.category.parentCid];
        }
      });
    },
    //添加三级分类
    addCategory() {
      this.$refs["addForm"].validate((valid) => {
        if (valid) {
          this.$http({
            url: this.$http.adornUrl("/materialCategory/addMaterialCategory"),
            method: "post",
            data: this.$http.adornData(this.category, false),
          }).then(({ data }) => {
            if (data.code === 200) {
              this.$message({
                message: "菜单保存成功",
                type: "success",
              });
            } else {
              this.$message.error(data.msg);
            }
            //关闭对话框
            this.dialogVisible = false;
            //刷新出新的菜单
            this.getMenus();
          });
        }
      }),
        console.log("提交的三级分类数据", this.category);
    },

    remove(node, data) {
      var userIds = [data.id];
      var ids = userIds.toString();
      console.log(ids);
      this.$confirm(`是否删除【${data.text}】菜单?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http({
            url: this.$http.adornUrl(
              `/materialCategory/batchDeleteMaterialCategory?ids=${ids}`
            ),
            method: "post",
          }).then(({ data }) => {
            console.log(data);
            if (data.code == 200) {
              this.$message({
                message: "菜单删除成功",
                type: "success",
              });
              //刷新出新的菜单
              this.getMenus();
            } else {
              this.$message.error(data.msg);
            }
            // //设置需要默认展开的菜单
            // // this.expandedKey = [node.parent.data.catId];
          });
        })
        .catch(() => {});

      console.log("remove", node, data);
    },

    // 关闭弹出框清空输入内容
    closeDialog() {
      this.category.parentName = "";
      this.category.parentId = "";
      this.category.name = "";
      this.category.serialNo = "";
      this.category.sort = "";
      this.category.remark = "";
      this.category1 = true;
    },
  },
  //生命周期 - 创建完成（可以访问当前this实例）
  created() {
    this.getMenus();
  },
  //生命周期 - 挂载完成（可以访问DOM元素）
  mounted() {},
  beforeCreate() {}, //生命周期 - 创建之前
  beforeMount() {}, //生命周期 - 挂载之前
  beforeUpdate() {}, //生命周期 - 更新之前
  updated() {}, //生命周期 - 更新之后
  beforeDestroy() {}, //生命周期 - 销毁之前
  destroyed() {}, //生命周期 - 销毁完成
  activated() {}, //如果页面有keep-alive缓存功能，这个函数会触发
};
</script>
<style scoped>
</style>